| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> |
| Cc: | Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Claudio Freire <klaussfreire(at)gmail(dot)com>, Jim Nasby <jim(at)nasby(dot)net>, Greg Stark <stark(at)mit(dot)edu>, Josh Berkus <josh(at)agliodbs(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: ANALYZE sampling is too good |
| Date: | 2013-12-10 00:17:09 |
| Message-ID: | 31233.1386634629@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Mark Kirkwood <mark(dot)kirkwood(at)catalyst(dot)net(dot)nz> writes:
> I did a test run:
> pgbench scale 2000 (pgbench_accounts approx 25GB).
> postgres 9.4
> i7 3.5Ghz Cpu
> 16GB Ram
> 500 GB Velociraptor 10K
> (cold os and pg cache both runs)
> Without patch: ANALYZE pgbench_accounts 90s
> With patch: ANALYZE pgbench_accounts 91s
> So I'm essentially seeing no difference :-(
What OS and filesystem?
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Jim Nasby | 2013-12-10 00:19:32 | Re: [RFC] Shouldn't we remove annoying FATAL messages from server log? |
| Previous Message | Mark Kirkwood | 2013-12-10 00:14:00 | Re: ANALYZE sampling is too good |